bool ir_bumper_left
bool ir_bumper_right
bool ir_bumper_front_left
bool ir_bumper_front_right
bool ir_bumper_front
bool ir_bumper_back_left
bool ir_bumper_back_right


bool cliff_left
bool cliff_right
bool cliff_front_left
bool cliff_front_right
bool cliff_back_left
bool cliff_back_right

bool wheel_drop_left
bool wheel_drop_right
bool wheel_over_current_left
bool wheel_over_current_right
